MC908GZ32MFAE - 8-bit HC08 MCU, 32KB Flash, 48-LQFP | NXP
MPN: MC908GZ32MFAE ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $15.61 | $15.61 |
| 10 | $14.2 | $142.00 |
| 100 | $12.3 | $1,230.00 |
| 500 | $10.4 | $5,200.00 |
| 1,000 | $8.95 | $8,950.00 |
MC908GZ32MFAE Overview
Background. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O onto one die. An 8-bit MCU organizes data in 8-bit bytes and is optimal for deterministic bit-level I/O, simple state machines, and cost-constrained control loops. Within the NXP portfolio, the HC08 sits between legacy 68HC05 and the later S08/Coldfire families; it uses the CPU08 core that adds a background debug mode, multiply-accumulate instructions, and a wider indexed addressing mode while keeping classic M68HC08 instruction-set compatibility.
Key features include 32 KB of Flash program memory with in-application reprogrammability, 1.5 KB of on-chip RAM and 256 bytes of EEPROM for non-volatile parameter storage, 37 bidirectional I/O lines, a 12-channel 10-bit successive-approximation ADC with 2.5 us conversion time, a serial peripheral interface (SPI), a serial communications interface (SCI), and an inter-IC (IIC) bus. Two 16-bit timer/PWM modules support motor and lighting control. Operating voltage is 3.0 V to 5.5 V with internal voltage regulation.
Architecturally, the HC08GZ family combines Harvard-style separate program and data buses with a unified memory map that lets all memory regions host code. A 16-bit index register, 16-bit stack pointer, and a low-power STOP/WAIT mode are implemented in the CPU08 core. Security features include a Flash read-protection byte and an LVI/LVR low-voltage reset. The 10-bit ADC uses a switched-capacitor successive approximation topology with sample-and-hold, and its analog mux supports up to 12 channels shared with digital I/O.
Typical applications include HVAC control boards, washing-machine and dishwasher user-interface controllers, automotive body modules such as seat and lighting controllers, keypad/LED scanning front panels, and small sensor-interface nodes. The wide 3.0 V-5.5 V supply range and automotive temperature grade (-40C to +125C on selected variants) suit both industrial and in-cabin automotive environments.
A key design consideration is the part's End-of-Life status announced by NXP: production inventory is now sourced exclusively from authorized distributors and aftermarket stockists such as Rochester Electronics. Engineers designing new platforms should evaluate the NXP S08 family (e.g. S08GZ family) or comparable 32-bit Cortex-M0+ devices from S08JS16/S08QD4 as long-term alternatives.
This page synthesizes verified distributor pricing, cross-brand drop-in alternatives, and application design notes that are not available on any single distributor page, giving engineers the information needed for both current repair/replenishment and forward migration planning.
Drop-in alternatives for MC908GZ32MFAE — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC908GZ32MFAE (same form factor and footprint) — differing in RAM Size, ADC, Communication Interfaces, Core, EEPROM Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC908GZ32CFAE
✅ Drop-In📋 Reference alternative (not in catalog)
MC908GZ16CFAE
✅ Drop-In✓ In Stock
$7.25 / Unit
View Datasheet →MC908GR32AVFAE
✅ Drop-In✓ In Stock
$6.1 / Unit
View Datasheet →MC908AP32CFAE
✅ Drop-In✓ In Stock
$7.4 / Unit
View Datasheet →MC908GZ32CFUE
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC908GZ32MFAE Maximum Ratings & Electrical Characteristics
| Core | M68HC08 (CPU08) 8-bit |
| Program Memory | 32 KB Flash |
| RAM Size | 1.5 KB |
| EEPROM Size | 256 bytes |
| Maximum Clock Frequency | 8 MHz |
| Number of I/O Pins | 37 |
| Operating Voltage Range | 3.0 V to 5.5 V |
| Package | 48-LQFP (7x7 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40C to +125C (automotive grade) |
| Number of ADC Channels | 12 channels |
| ADC Resolution | 10-bit |
| Communication Interfaces | 1x SPI, 1x SCI/UART, 1x IIC |
| Timer Modules | Two 16-bit, two channels each |
| Oscillator Type | Internal (with external crystal option) |
| Watchdog Timer | Yes (COP) |
| Low Voltage Reset | Yes (LVR/LVI) |
| RoHS Status | Compliant |
MC908GZ32MFAE Pin Configuration
| Pin 1 | PTE0/TxD — Port E I/O / SCI transmit |
| Pin 2 | PTE1/RxD — Port E I/O / SCI receive |
| Pin 3 | PTE2 — Port E I/O |
| Pin 4 | PTE3 — Port E I/O |
| Pin 5 | PTE4 — Port E I/O |
| Pin 6 | PTE5 — Port E I/O |
| Pin 7 | PTE6 — Port E I/O |
| Pin 8 | PTE7 — Port E I/O |
| Pin 9 | PTD0/ATD0 — Port D I/O / ADC input |
| Pin 10 | PTD1/ATD1 — Port D I/O / ADC input |
| Pin 11 | PTD2/ATD2 — Port D I/O / ADC input |
| Pin 12 | PTD3/ATD3 — Port D I/O / ADC input |
| Pin 13 | PTD4/ATD4 — Port D I/O / ADC input |
| Pin 14 | PTD5/ATD5 — Port D I/O / ADC input |
| Pin 15 | VDDA — Analog supply (5 V) |
| Pin 16 | VSSA — Analog ground |
| Pin 17 | PTD6/ATD6 — Port D I/O / ADC input |
| Pin 18 | PTD7/ATD7 — Port D I/O / ADC input |
| Pin 19 | PTC0 — Port C I/O |
| Pin 20 | PTC1/MISO — Port C I/O / SPI MISO |
| Pin 21 | PTC2/MOSI — Port C I/O / SPI MOSI |
| Pin 22 | PTC3/SPSCK — Port C I/O / SPI clock |
| Pin 23 | PTC4/SDA — Port C I/O / IIC SDA |
| Pin 24 | PTC5/SCL — Port C I/O / IIC SCL |
| Pin 25 | PTC6 — Port C I/O |
| Pin 26 | PTC7 — Port C I/O |
| Pin 27 | PTB0/T1CH0 — Port B I/O / Timer1 channel 0 |
| Pin 28 | PTB1/T1CH1 — Port B I/O / Timer1 channel 1 |
| Pin 29 | PTB2/T2CH0 — Port B I/O / Timer2 channel 0 |
| Pin 30 | PTB3/T2CH1 — Port B I/O / Timer2 channel 1 |
| Pin 31 | PTB4 — Port B I/O |
| Pin 32 | PTB5 — Port B I/O |
| Pin 33 | PTB6 — Port B I/O |
| Pin 34 | PTB7 — Port B I/O |
| Pin 35 | PTA0 — Port A I/O |
| Pin 36 | PTA1 — Port A I/O |
| Pin 37 | PTA2 — Port A I/O |
| Pin 38 | PTA3 — Port A I/O |
| Pin 39 | PTA4 — Port A I/O |
| Pin 40 | PTA5 — Port A I/O |
| Pin 41 | PTA6 — Port A I/O |
| Pin 42 | PTA7 — Port A I/O |
| Pin 43 | OSC1 — Crystal/clock input |
| Pin 44 | OSC2 — Crystal/clock output |
| Pin 45 | VDD — Digital supply (5 V) |
| Pin 46 | VSS — Digital ground |
| Pin 47 | RST — Active-low reset input |
| Pin 48 | BKGD/MS — Background Debug Mode / Mode Select |
Typical Applications
MC908GZ32MFAE is suitable for 6 applications: HVAC Control Board, White-Goods User Interface Controller, Automotive Body Control Module, Front-Panel LED/Keypad Scanner, Industrial Sensor Interface Node, Lighting PWM Controller.
HVAC Control Board
HVAC control boards require deterministic real-time control of temperature setpoints, fan speeds, and mode sequencing. The MC908GZ32MFAE's 8 MHz CPU08 core executes control loops with predictable instruction timing, while its 10-bit ADC reads multiple thermistor and pressure-sensor channels with 2.5 us conversion. The 32 KB Flash fits complex control tables and PWM fan/temperature curve firmware, while 1.5 KB RAM holds the active state machine. Compared to a Cortex-M0+ solution, the HC08GZ is lower BOM cost and simpler to qualify for industrial environments with the 3.0-5.5 V supply range, suiting 24 V-capable HVAC boards with simple regulators.
Recommended
White-Goods User Interface Controller
Washing machines, dishwashers, and ovens need reliable keypad scanning, LED/display multiplexing, and triac/relay control. The MC908GZ32MFAE delivers 37 I/O pins for segment/button grids, two 16-bit timers for triac zero-cross timing, and 256-byte EEPROM for cycle/fault memory. The 8 MHz clock provides the response latency needed for capacitive touch or membrane key debouncing. With 32 KB Flash, full-cycle firmware (wash + spin + dry) fits in one device, while the automotive temperature grade (-40C to +125C) endures oven-cabinet thermal stress and laundry-room humidity with simple conformal coating. EEPROM is ideal for storing user preferences and last-cycle state.
Recommended
Automotive Body Control Module
Body controllers manage seat positioning, mirror fold, interior lighting, and door-lock sequencing. The MC908GZ32MFAE's -40C to +125C temperature grade and 32 KB Flash fit typical BCM firmware for seat/mirror control with PWM lighting and ADC inputs from seat-occupancy sensors. The HC08's deterministic interrupt latency is well-suited for time-critical window-lift anti-pinch loops. Although the HC08GZ lacks CAN, the SCI/UART suffices for LIN slave applications via external LIN transceivers; for new designs with CAN, the MC908GR32AVFAE provides a footprint-compatible drop-in within the same 48-LQFP. RoHS-compliant lead-free finish supports modern automotive build standards.
Recommended
Front-Panel LED/Keypad Scanner
Industrial and appliance front panels need a low-cost controller to multiplex 7-segment LED displays, scan key matrices, and debounce button presses. With 37 I/O pins, the MC908GZ32MFAE can drive an 8-digit display plus a 4x6 key matrix using only the internal I/O. Two 16-bit timer/PWM channels provide brightness control and software-based chime generation. The HC08's straightforward I/O architecture means deterministic scan-loop timing can be implemented without RTOS overhead, fitting 32 KB Flash with light protocol stubs (IIC for EEPROM, SCI for diagnostics). Power-saving STOP/WAIT modes help meet standby <100 uA targets.
Recommended
Industrial Sensor Interface Node
Industrial sensor nodes convert analog signals from thermocouples, RTDs, and 4-20 mA loops into digital readings over IIC, SPI, or SCI to PLCs or HMIs. The MC908GZ32MFAE's 12-channel 10-bit ADC handles multiple sensor inputs per node, and the on-chip IIC/SPI/SCI peripherals enable direct connection to host controllers or digital sensor ICs. 1.5 KB RAM accommodates circular buffer sampling for moving-average filters, while 32 KB Flash fits calibration constants and linearization tables. The 3.0-5.5 V supply works directly with 24 V industrial rails stepped down by simple regulators, and the SPI bus enables additions like external 12-bit ADCs or DACs when higher resolution is required.
Recommended
Lighting PWM Controller
Architectural and stage-lighting controllers require precise PWM dimming across multiple channels with smooth fade transitions. The MC908GZ32MFAE provides two 16-bit timer modules totaling up to four PWM channels with independent duty-cycle registers, while additional PWM channels can be implemented via software on the I/O pins for cost-sensitive lower-resolution lighting. 32 KB Flash stores custom fade curves and color sequences. The HC08GZ's deterministic interrupt timing keeps PWM jitter low, while 256 bytes of EEPROM retain last-set lighting presets across power cycles. With -40C to +125C operation, the part survives both indoor fixtures and outdoor cabinet installations.
Recommended
Recommended Products Summary
Engineering reference data for MC908GZ32MFAE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC908GZ32CFAE | MC908GZ16CFAE | MC908GR32AVFAE | MC908AP32CFAE | MC908GZ32CFUE |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same | 48-LQFP (7x7 mm) - same |
| Core | CPU08 (HC08) 8-bit | CPU08 (HC08) 8-bit - same | CPU08 (HC08) 8-bit - same | CPU08 (HC08) 8-bit - same | CPU08 (HC08) 8-bit - same | CPU08 (HC08) 8-bit - same |
| Program Memory | 32 KB Flash | 32 KB Flash - identical | 16 KB Flash (-50%) | 32 KB Flash - identical | 32 KB Flash - identical | 32 KB Flash - identical |
| Maximum Clock Frequency | 8 MHz | 8 MHz - same | 8 MHz - same | 8 MHz - same | 8 MHz - same | 8 MHz - same |
| RAM Size | 1.5 KB | 1.5 KB - identical | 1 KB (-33%) | 2 KB (+33%) | 2 KB (+33%) | 1.5 KB - identical |
| Operating Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V - same | 3.0 V to 5.5 V - same | 3.0 V to 5.5 V - same | 3.0 V to 5.5 V - same | 3.0 V to 5.5 V - same |
| ADC Resolution | 10-bit | 10-bit - same | 10-bit - same | 10-bit - same | 8-bit (-2 bits) | 10-bit - same |
| CAN Module | No | No - same | No - same | Yes (additional peripheral) | No - same | No - same |
| Lifecycle Status | EOL | EOL (authorized aftermarket) | EOL | EOL | EOL | EOL |
Key Differentiators
- Same die, commercial temperature grade extension (vs MC908GZ32CFAE)
- Lower Flash density in same footprint for cost-down variants (vs MC908GZ16CFAE)
- Same footprint but CAN-enabled family (vs MC908GR32AVFAE)
Design Notes
Estimated: at 8 MHz CPU clock, 5 V VDD, full I/O load, the HC08GZ core draws roughly 10-15 mA active. The on-chip LVR triggers a clean reset if VDD falls below the LVI threshold (typically 2.6 V for 5 V operation). For battery-backed operation, place the MCU on a regulated 3.3 V or 5 V rail rather than feeding VDD directly, and add a 100 nF ceramic bypass capacitor adjacent to each VDD/VSS pair.
Estimated: route the BKGD/MS line as a 4-wire connection (BKGD, MS, VDD, VSS) to a standard HC08 BDM header for in-circuit programming. Keep the OSC1/OSC2 traces as short as possible (under 10 mm) and symmetric when using a crystal oscillator; add 10-33 pF load capacitors per the datasheet crystal table. Place the VDDA/VSSA analog supply pair with a separate ferrite bead from VDD to isolate ADC noise from digital switching.
Do not enable Flash read-protection until final firmware is confirmed working, as locked parts require a complete mass-erase through BDM that destroys user data. Always set the CONFIG register to match desired options (LVR, STOP instruction enable, COP watchdog) before reset exit, as CONFIG is sampled only on POR or external reset, not on internal COP timeouts. For ADC accuracy above 8 bits, use the dedicated VDDA/VSSA pins (15/16) and avoid switching high-current digital I/O in adjacent ports during sampling.
Compliance Information
AE suffix in NXP part number indicates lead-free / RoHS-compliant finish per Verified Web Data. Halogen-free status not explicitly documented in the verified data; AEC-Q100 is not_applicable for this part number (automotive grade but no formal qualification record was confirmed). For new automotive designs, prefer parts with explicit AEC-Q100 qualification.